| 摘要 |
<p>A backlight drive circuit, a backlight drive method, a backlight module and a liquid crystal display. The backlight drive circuit comprises: a temperature sensing module (30) which monitors operating temperatures of different areas of a load (20) and generates a plurality of detection signals; a comparison module (40) which compares the plurality of detection signals generated by the temperature sensing module (30) and generates a control signal, wherein the control signal is used for controlling the magnitude of a drive current output by a backlight drive module (10); and the backlight drive module (10) which converts an input voltage into a required drive current and provides same to the load (20). The backlight drive circuit monitors operating temperatures of a backlight source in different areas through the temperature sensing module (30) arranged near the backlight light source and gives feedback to the backlight drive module (10). The backlight drive module (10) adjusts the magnitude of the drive current thereof according to the operating temperatures of the backlight light source, so that the condition of local overheating of the backlight light source is prevented and the usage life of the backlight source is prolonged, thereby improving the display quality of a liquid crystal display.</p> |
